diff --git a/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/Intent.kt b/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/Intent.kt
index 41494f9e..138e9b6b 100644
--- a/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/Intent.kt
+++ b/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/Intent.kt
@@ -28,7 +28,7 @@ enum class AppId {
 @Serializable
 data class Intent(val scope: IntentScope, val version: IntentVersion, val appId: AppId)
 
-@Serializable data class IntentMessage<T>(val intent: Intent, val message: T)
+@Serializable data class IntentMessage<T>(val intent: Intent, val value: T)
 
 // An intent abstraction. This is so as it is scoped, but can well be a top level function
 // TODO: This is a placeholder for now, look back at this later
diff --git a/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/ProgrammableTransaction.kt b/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/ProgrammableTransaction.kt
index a5ed76b2..7550ddf2 100644
--- a/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/ProgrammableTransaction.kt
+++ b/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/ProgrammableTransaction.kt
@@ -2,21 +2,22 @@ package xyz.mcxross.ksui.model
 
 import kotlinx.serialization.Serializable
 import xyz.mcxross.bcs.Bcs
+import xyz.mcxross.ksui.util.bcs
 
 @Serializable
 data class ProgrammableTransaction(val inputs: List<CallArg>, val commands: List<Command>) :
   TransactionKind()
 
 class ProgrammableTransactionBuilder {
-  private val inputs: MutableMap<BuilderArg, CallArg> = LinkedHashMap()
+  private val inputs: MutableMap<BuilderArg, CallArg> = mutableMapOf()
   private val command = Command()
 
-  private fun input(arg: BuilderArg, value: CallArg): Argument.Input {
+  private fun input(arg: BuilderArg, value: CallArg): Argument {
     inputs[arg] = value
-    return Argument.Input(inputs.size - 1)
+    return Argument.Input((inputs.size - 1).toULong())
   }
 
-  fun input(bytes: ByteArray, forceSeparate: Boolean): Argument.Input {
+  fun input(bytes: ByteArray, forceSeparate: Boolean): Argument {
     val arg =
       if (forceSeparate) {
         BuilderArg.ForcedNonUniquePure(inputs.size)
@@ -26,12 +27,12 @@ class ProgrammableTransactionBuilder {
     return input(arg, CallArg.Pure(bytes))
   }
 
-  inline fun <reified T> input(value: T): Argument.Input {
+  inline fun <reified T> input(value: T): Argument {
     val bcs = Bcs {}
     return input(bcs.encodeToByteArray(value), false)
   }
 
-  inline fun <reified T> forceSeparateInput(value: T): Argument.Input {
+  inline fun <reified T> forceSeparateInput(value: T): Argument {
     val bcs = Bcs {}
     return input(bcs.encodeToByteArray(value), true)
   }
@@ -45,9 +46,12 @@ class ProgrammableTransactionBuilder {
   }
 }
 
+@Serializable
 sealed class BuilderArg {
-  data class Object(val objectId: ObjectId) : BuilderArg()
 
+  @Serializable data class Object(val objectId: ObjectId) : BuilderArg()
+
+  @Serializable
   data class Pure(val data: ByteArray) : BuilderArg() {
     override fun equals(other: Any?): Boolean {
       if (this === other) return true
diff --git a/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/Transaction.kt b/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/Transaction.kt
index 8a4f87da..ec1e882f 100644
--- a/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/Transaction.kt
+++ b/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/Transaction.kt
@@ -5,6 +5,8 @@ import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import xyz.mcxross.bcs.Bcs
 import xyz.mcxross.ksui.exception.UnknownTransactionFilterException
+import xyz.mcxross.ksui.model.serializer.CallArgObjectSerializer
+import xyz.mcxross.ksui.model.serializer.CallArgPureSerializer
 import xyz.mcxross.ksui.model.serializer.DisassembledFieldSerializer
 import xyz.mcxross.ksui.model.serializer.ObjectChangeSerializer
 import xyz.mcxross.ksui.model.serializer.TransactionFilterSerializer
@@ -85,6 +87,7 @@ sealed class TransactionKind {
 sealed class CallArg {
 
   @Serializable
+  @SerialName("")
   data class Pure(val data: ByteArray) : CallArg() {
     override fun equals(other: Any?): Boolean {
       if (this === other) return true
@@ -100,7 +103,8 @@ sealed class CallArg {
     }
   }
 
-  @Serializable data class Object(val arg: ObjectArg) : CallArg()
+  @Serializable(with = CallArgObjectSerializer::class)
+  data class Object(val arg: ObjectArg) : CallArg()
 }
 
 @Serializable
@@ -414,6 +418,7 @@ open class Command {
    * @param address to send the objects to.
    */
   @Serializable
+  @SerialName("")
   data class TransferObjects(val objects: List<Argument>, val address: Argument) : Command()
 
   /**
@@ -422,7 +427,10 @@ open class Command {
    * @param coin to split.
    * @param into the amounts to split the coin into.
    */
-  @Serializable data class SplitCoins(val coin: Argument, val into: List<Argument>) : Command()
+
+  @Serializable
+  @SerialName("")
+  data class SplitCoins(val coin: Argument, val into: List<Argument>) : Command()
 
   /**
    * Merges n-coins into the first coin
@@ -666,10 +674,19 @@ sealed class Argument {
 
   @Serializable data object GasCoin : Argument()
 
-  @Serializable data class Input(val inputObjectOrPrimitiveValue: Int) : Argument()
+  @Serializable data class Input <T> (val inputObjectOrPrimitiveValue: T) : Argument()
 
   @Serializable data class Result(val commandResult: Int) : Argument()
 
   @Serializable
   data class NestedResult(val commandIndex: Int, val returnValueIndex: Int) : Argument()
 }
+
+@Serializable
+data class SenderSignedData(val senderSignedTransactions: List<SenderSignedTransaction>)
+
+@Serializable
+data class SenderSignedTransaction(
+  val intentMessage: IntentMessage<TransactionData>,
+  val txSignatures: List<String>,
+)
diff --git a/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/serializer/CallArgObjectSerializer.kt b/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/serializer/CallArgObjectSerializer.kt
new file mode 100644
index 00000000..d24526c2
--- /dev/null
+++ b/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/serializer/CallArgObjectSerializer.kt
@@ -0,0 +1,17 @@
+package xyz.mcxross.ksui.model.serializer
+
+import kotlinx.serialization.KSerializer
+import xyz.mcxross.ksui.model.CallArg
+
+object CallArgObjectSerializer : KSerializer<CallArg.Object> {
+  override val descriptor: kotlinx.serialization.descriptors.SerialDescriptor =
+    kotlinx.serialization.descriptors.buildClassSerialDescriptor("CallArg.Object") {}
+
+  override fun serialize(encoder: kotlinx.serialization.encoding.Encoder, value: CallArg.Object) {
+    encoder.encodeByte(1)
+  }
+
+  override fun deserialize(decoder: kotlinx.serialization.encoding.Decoder): CallArg.Object {
+    throw NotImplementedError("CallArg.Object is not implemented")
+  }
+}
diff --git a/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/serializer/CallArgPureSerializer.kt b/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/serializer/CallArgPureSerializer.kt
new file mode 100644
index 00000000..255e68c5
--- /dev/null
+++ b/lib/src/commonMain/kotlin/xyz/mcxross/ksui/model/serializer/CallArgPureSerializer.kt
@@ -0,0 +1,27 @@
+package xyz.mcxross.ksui.model.serializer
+
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import kotlinx.serialization.encoding.encodeCollection
+import xyz.mcxross.ksui.model.CallArg
+
+object CallArgPureSerializer : kotlinx.serialization.KSerializer<CallArg.Pure> {
+  override val descriptor: SerialDescriptor =
+    kotlinx.serialization.descriptors.buildClassSerialDescriptor("CallArg.Pure") {
+      element("data", kotlinx.serialization.serializer<Byte>().descriptor)
+    }
+
+  override fun serialize(encoder: Encoder, value: CallArg.Pure) {
+    encoder.encodeByte(0)
+    encoder.encodeCollection(descriptor, value.data.size) {
+      for (element in value.data) {
+        encoder.encodeByte(element)
+      }
+    }
+  }
+
+  override fun deserialize(decoder: Decoder): CallArg.Pure {
+    throw NotImplementedError("CallArg.Pure is not implemented")
+  }
+}
diff --git a/lib/src/tvosMain/kotlin/xyz/mcxross/ksui/client/Platform.tvos.kt b/lib/src/tvosMain/kotlin/xyz/mcxross/ksui/client/Platform.tvos.kt
new file mode 100644
index 00000000..f9490534
--- /dev/null
+++ b/lib/src/tvosMain/kotlin/xyz/mcxross/ksui/client/Platform.tvos.kt
@@ -0,0 +1,15 @@
+package xyz.mcxross.ksui.client
+
+import io.ktor.client.engine.*
+import kotlinx.coroutines.CoroutineScope
+import kotlin.coroutines.CoroutineContext
+
+actual val defaultEngine: HttpClientEngine
+  get() = TODO("Not yet implemented")
+
+actual suspend fun <T> runBlocking(
+  context: CoroutineContext,
+  block: suspend CoroutineScope.() -> T
+): T {
+  TODO("Not yet implemented")
+}
diff --git a/lib/src/watchosMain/kotlin/xyz/mcxross/ksui/client/Platform.watchos.kt b/lib/src/watchosMain/kotlin/xyz/mcxross/ksui/client/Platform.watchos.kt
new file mode 100644
index 00000000..f9490534
--- /dev/null
+++ b/lib/src/watchosMain/kotlin/xyz/mcxross/ksui/client/Platform.watchos.kt
@@ -0,0 +1,15 @@
+package xyz.mcxross.ksui.client
+
+import io.ktor.client.engine.*
+import kotlinx.coroutines.CoroutineScope
+import kotlin.coroutines.CoroutineContext
+
+actual val defaultEngine: HttpClientEngine
+  get() = TODO("Not yet implemented")
+
+actual suspend fun <T> runBlocking(
+  context: CoroutineContext,
+  block: suspend CoroutineScope.() -> T
+): T {
+  TODO("Not yet implemented")
+}